using Google.Protobuf;
using Google.Protobuf.WellKnownTypes;


using ServerCore;
using ServerBase;
using ServerCommon;
using ServerCommon.BusinessLogDomain;
using MetaAssets;


namespace GameServer.PacketHandler;

[PacketHandler(typeof(ClientToGameReq), typeof(ClientToGameReq.Types.ChangeStateReq), typeof(ChangeStatePacketHandler), typeof(GameLoginListener))]
public class ChangeStatePacketHandler : PacketRecvHandler
{
    public static bool send_S2C_ACK_CHANGE_STATE(Player player, Result result)
    {
        var ack_packet = new ClientToGame();
        ack_packet.Response = new ClientToGameRes();

        ack_packet.Response.ErrorCode = result.ErrorCode;
        ack_packet.Response.ChangeStateRes = new();

        if (false == GameServerApp.getServerLogic().onSendPacket(player, ack_packet))
        {
            return false;
        }

        return true;
    }

    public override async Task<Result> onProcessPacket(ISession entityWithSession, IMessage recvMessage)
    {
        var result = new Result();
        var err_msg = string.Empty;

        var entity_player = entityWithSession as Player;
        NullReferenceCheckHelper.throwIfNull(entity_player, () => $"entity_player is null !!!");

        var server_logic = GameServerApp.getServerLogic();

        var state_action = entity_player.getEntityAction<StateAction>();
        if (state_action == null)
        {
            err_msg = $"Failed to get state action : {nameof(StateAction)}";
            result.setFail(ServerErrorCode.EntityActionNotFound, err_msg);
            Log.getLogger().error(err_msg);

            send_S2C_ACK_CHANGE_STATE(entity_player, result);
            return result;
        }

        var game_msg = recvMessage as ClientToGame;
        if (game_msg == null)
        {
            err_msg = $"Failed to cast ClientToGame !!! : {nameof(ClientToGame.Request.ChangeStateReq)}";
            result.setFail(ServerErrorCode.ClassTypeCastIsNull, err_msg);
            Log.getLogger().error(result.toBasicString());

            send_S2C_ACK_CHANGE_STATE(entity_player, result);
            return result;
        }

        var request = game_msg.Request.ChangeStateReq;

        if (EnumHelper.isDefined<PlayerStateType>(request.State) == false)
        {
            err_msg = $"is Not Defined PlayerStateType !!! PlayerStateType : {request.State} - {entity_player.toBasicString()}";
            result.setFail(ServerErrorCode.ServerTypeInvalid, err_msg);
            Log.getLogger().error(err_msg);
            send_S2C_ACK_CHANGE_STATE(entity_player, result);
            return result;
        }

        var player_state_type = (PlayerStateType)request.State;

        result = await state_action.ChangeState(player_state_type);
        if (result.isFail())
        {
            err_msg = $"Failed to ChangeState() !!! : {result.toBasicString()} - {entity_player.toBasicString()}";
            Log.getLogger().error(err_msg);
            send_S2C_ACK_CHANGE_STATE(entity_player, result);
            return result;
        }
        send_S2C_ACK_CHANGE_STATE(entity_player, result);

        return result;
    }
}